Fountain-pen.



FOUNTAIN PEN.

APPLICATION FILED APB..21, 191

Patented Nov. 17, 191 1 UNITED STATES PATENT OFFICE.

ORRIN G. WISEMAN AND EARL R. GEORGE, OF DES MOINES, IOWA.

To all whom'it may concern:

Be it known that we, ORRIN G. WISEMAN and EARL R. GEORGE, citizens ofthe United States, and residents of Des Moines, in the county of Polkand State of Iowa, have invented a certain new and useful Fountain- Pen,of which the following is a specification.

The object of our invention is to provide a fountain pen of simple,durable and inexpensive construction of the self filling type. Moreparticularly, it is our purpose to provide a fountain pen of this typeprovided with means whereby a vacuum may be created and so constructedthat the creation of a vacuum directly draws ink into the pen barrel sothat the pen barrel is filled gradually as the vacuum is createdtherein.

Still a further object is to provide a pen of this type in which ismounted a plunger, and provided with an intake pamage opening at itsupper end into a pen barrel, and so arranged that the plunger may beushed from the upper to the lower endof t 1e pen for filling the barrel,and so arranged that the plunger will remain at the lower end of thepen-after the pen has been filled.

Still a further object is to provide in a pen of the kind mentioned,means for closing the lower end of the intake passage after the pen hasbeen filled.

Our invention consists in certain details, in the construction,combination and arrangement of the various parts of the device wherebythe objects contemplated are attained, as hereinafter more fully setforth, pointed out in our claims and illustrated in the accompanyingdrawings, in which:

Figure 1 shows a central, longitudinal,

sectional view through a fountain pen embodying our invention. Fig. 2shows a vertical, transverse, sectional view taken on the line 22 ofFig. 1. Fig. 3 shows a similar view taken on the line 33 of Fig. 1, andFig. 4 shows a detail, se'ctionalview, taken on the line 44 of Fig. 1.

In the accompanying drawings, We-have used the reference numeral 10 toindicate a hollow pen barrel which may be of ordinary constructionexcept in the particulars hereinafter set forth. The pen barrel 10 ispreferably made with the wall at one side thicker than the rest of thewall, as clearly shown in Figs. 2 and 3 and we provide a longitudinalink intake passage 11 in the Specification of Letters Patent.

Application filed April 21, 1913.

Patented Nov. 1'7, 1914.

Serial No. 762,732.

thick portion of said wall- At its upper end the intake passage 11communicates through the opening 12 with the interior of the pen barrel.The upper end of the pen is externally screw threaded to receive a shortcap 13. Mounted in the pen barrel is a plunger 14 to which is secured astem 15 which extends through the upper end of the pen and is screwedinto the cylindrical body 13 loosely received in the outer end of thecap 13. In the lower surface of the plunger 14 is a slot to receive ascrew driver for holding the plunger when attaching the stem 15.

We preferably enlarge the opening around the stem 15, at the upper endof the pen barrel, and surround the stem for a short distance withpacking 16 which is held in position by a screw threaded plug 17. Theplug 17 may be readily removed for placing new packing in the pen,should that be desired by a screw driver inserted in a slot in its outerend. The lower end of the barrel'10 is internally screw threaded toreceivethe body or section 18. The upper'end of the section 18, at 19,is concave, as shown in Fig. 1. The lower end of the body 18 is providedwith an opening 20 to receive the feeder 21. The opening 20 ispreferably somewhat smaller in diameter at its inner upper end than atits outer end and the feeder 21 is preferably somewhat smaller at itsupper end than at its'central portion so that it may be wedged into theopenlng .40 for gripping the point 22 between the body 18 and theportion 21, asshown in Fig. 1. The feeder 21 is provided with a groove23 adjacent to the pen point 22 and extending to the upper end of saidportion 21, for the purpose of permit-ting ink to flow downwardly to thepen. The upper surface of the upper end of the portion 21 never engagesthe body 18 at the upper end of the opening 20. This construction isadopted for the purpose of permitting a free flow of ink. From the upperend of the opening 20 a smaller passage 24 extends to the upper end ofthe section 18. Formed in the section 18 is a passage 25 communicatingat its upper end with the lower end of the passage 11 and communicatingat its lower end with the opening which receives the member 21. In themember 21 is a passage 26, which, when said member is installed inposition in the pen, communicates at its upper end with the lower end ofthe passage 25 and is open at its lower end at a point above the lowerendof the feeder 21.

Slidably mounted on the surface of the portion 21 is a cover 27 arrangedin one position of its sliding movement to close the.

lower end of the passage 26. The cover 27 is provided with a narrowflange 28 for convenience in sliding said cover. In the lower end of thepen barrel, on the interior thereof, are a plurality of vertical grooves29, which are a trifle longer than the thickness of the plunger 14 andare designed to permit ink to flow around said plunger when the pen isin use.

In the practical use of our improved fountain pen the parts areassembled in the positions shown in Fig. 1. The sliding cover 27 is thenmoved downwardly until the lower end of the passage 26 is opened. Thecap 13 is then drawn upwardly until the plunger 14 is drawn to the upperend of the pen barrel. The lower end of the pen is then inserted intoany ordinary ink container until the lower end of the opening 20 issubmerged in the ink. The plunger 14 is then forced downwardly, therebycreating a vacuum in the upper end of the pen barrel and drawing inkupwardly into the pen barrel through the passages 26, 25, 11 and 12.When the plunger 14 has reached its lowermost position, the slidingcover 27 is moved upward to cover the lower end of the opening 26 andthe pen is ready for use.

With practically all of the fountain pens of the self filling type, nowin use, it is found that only a comparatively small quantity of ink canbe drawn into the pen barrel. This objection is a serious one in so muchas the amount of ink that can be carried is, on account of it, small andthe pens require frequent refilling and are frequently empty whenneeded.

With our device, constructed as above de scribed, we are able to fillpractically the entire reservoir. We are aware that pens of the plungertype have been used and patented but they usually employ a constructionwherein the stem of the plunger is at its outer and forward limit ofmovement when the pen is filled, thereby requiring a long and awkwardcap to cover the plunger stem. We have found that we can get into ourpen about twenty more drops of ink than can be drawn into any other selffilling pen of the same maximum reservoir capacity. On account of theuse of the slidquickly and easily assembled. It will be understood thatvariations may be made in the details of the construction of our pen andit is our intention to cover by this application any variations in suchconstruction which may be included within the scope of the followingclaims.

We claim as our invention:

1. A self filling fountain pen comprising a barrel formed with a centralreservoir and having a small intake passage extending from the lower endof said barrel to a'point near its upper endand communicating near theupper end of the barrel with the main reservoir, a plunger mounted in.said main reservoir, a .stem thereon extending through the upper end ofsaid stem barrel, a section screwed into the lower end of said barreland havin a recess in its lower end to re ceive the eeder and an openingextending from said recess to its upper end, a feeder received in saidrecess, said section being arranged in one position of its'movement tocover the lower end of said last named passage.

2. A self filling fountain pen comprising a barrel provided with a smallintake passage leadin from the lower end of the barrel to a point nearits upper end and communicating with the interior of the barrel at itsupper end, a plunger mounted for reciprocation in the barrel below theupper end of said intake passage, a stem on the plunger extendingthrough the upper end of the barrel, said barrel being provided with aninterior longitudinal groove at its lower end to permit the passage ofink past the plunger when the latter is in the lower position of itsmovement, and adjustable means for preventing ingress or egress fromsaid intake passage.

ORRIN G. WISEMAN.- EARL R. GEORGE.

Witnesses:

S. ROBINSON, M. WALLACE.

